Thorns, spines, and prickles are all elongated structures that are relatively hard with a sharp point...
Thorns, spines, and prickles are all elongated structures that are relatively hard with a sharp point at one end. Thorns are modified stems, spines are modified leaves, and prickles are outgrowths from a stem surface. These three structures are
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Homologous |
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Analogous |
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Aggregate structures |
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Phylogenetic |
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Harmonious |
Homework Answers
Thorns, spines, and prickles are analogous to each other. All three have the same function - protecting the plant from external harm by animals. But they are all having different evolutionary origins as already stated in the question - thorns are modified stems, spines are modified leaves, and prickles are outgrowths from a stem surface. So the correct answer is option B : Analogous.
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